Crossing-gate.



J. J. GARD- 'CROSSING GATE. APPLICATION FILED JUNE |.'191s..

1,196,853. Patented Sept. 5,1916.

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APPLICATION FILED JUNE 1. F915.

Patnted Sept. 5,1916.

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ran snares Parana ernron JOHNJ. GARD, OF HARVEY, ILLI l\TOIS, ASSIGNOR '10 BUDA COMPANY, OF CHICAGO,

ILIINOIS, A CORPORATION OF ILLINOIS.

CROSSING-GATE.

Specification of Letters Patent.

i Patented Sept. 5, 1916.

Application filed June 1, 1915. Serial No. 31,384.

To all whom it may concern:

Be it known that I, JOHN J. GARD, a citizen of the United States, and a resident of Harvey, in the county of Cook and State of Illinois, have invented new and useful Improvements in Crossing-Gates, of which the gates, and has reference more particularly to that type of crossing gate wherein motor driven actuating mechanism is employed to raise and lower the gate. In this type of gate, heretofore, the provision of a braking device was found necessary for checking further movement of the motor after the breaking of the energizing circuit, such further movement being in excess of that required to bringthe gate into either of its limiting positions. The principal object of this invention is to produce an improved form of actuating mechanism for crossing gates, which is constructed to obviate the necessity for providing the customary motor brake and its appurtenances, consequently reducing the initial cost and maintenance of the gate, and eliminating the op erative step of applying and releasing the brake each time the energizing circuit was broken and out. in at the extremes of gate movement.

My invention further contemplates the provision of an arrangement of parts in such mechanism designed to simplify its construction and increase its efficiency and utility to a marked degree.

These, together with such other objects as may hereinafter appear, or are incident to my invention I attain by means of a construction, illustrated in preferred form, wherein Figure 1 is a longitudinal section taken, through the gate post illustrating the application of my improved mechanism thereto,

' the gate being shown in lowered position;

Figure 2 represents a side elevation of the same taken at the left hand of Figure 1,"

Figure 3 is a front view of a portion of the structure as shown in Figure 1, illustrating the relation of the parts when the gate is in its raised position.

view taken along that I provide the gate post 4 with the usual motor 5 and gate 6, the latter being mounted on a shaft 7 which carries a bell crank lever 8 to one end of which is coupled the short gate 9. WVithin the vpost is a standard in Whose base portion 10 is journaled a shaft 11 carrying thereon a worm 12 designedto drive a worm gear segment 14 whose shaft 13 is mounted in the upwardly projecting spaced arms 10 of the standard. Suitable drive connections are provided between the motor shaft 5 and the Worm shaft 11, and as shown, may consist of the sprockets 15, 16, chain 17 and the gears 18 and 19, the sprocket 16 and the gear 18 being carried on a counter shaft 20 which has a bearing in the base 10. The shaft 13 is provided with a contact plate 13*; but for the sake tact connections are not here shown, a pref- .erable form of the same being disclosed in my patent N 1,049,840 of January 7, 1913, which may, if desired, be employed ingconnection with my present invention. Extending from the other end of the lever 8 to the worm gear segment is a connecting rod 21 terminating at its lower end in a fork 21 which is operatively attached to the web of the segment 14. It will bG fIHdQIStOOd, of course, that rotation given the motor to the worm in one direction imparts movement substantially on a half-tu rn to the segment in order to raise the gate, and reverse rotation of the worm serves to lower it, the driving relation continuing just so long as the teeth of the worm and worm gear segment are in operative engagement, and ceasing when disengaged or out of mesh. Any

excess rotative movement of the motor occur- "ment of the segment and to insure prompt operative engagement or meshing of the teeth of segment and worm upon reverse rov tation of the latter. With thls end in view, I provide the segment with a stop bar 22, and formed on the standard base 10 at each side of the worms are stop lugs or. abutments 26 and 27 which are disposed to cooperate With the bar 22, and at a time or times coincident, or substantially so, with the unmeshing or disengagement of the teeth. As already indicated, and as shown in Figures 1 and 8, respectively, this disengagement occurs at the completion of worm gear movement in one direction to close the gate and in the reverse direction to open the gate.

A reference to the drawings will show that the bar 22 is so located with reference to the abutments and the point of teeth disengagement as to be capable of a slight yield ing movement when contacting with the former, which movement occurs just prior to the disengagement of the teeth. in this connection, 1 preferably employ the interposed spacing member 24 which is mounted on the rear face 14* of the segment, and upon whose arms 23, 23', is carried the bar 22 by means of the headed bolts 2 which pass through the bar and arms and extend past the latter to receive thereon the coil springs 25 which serve to permit the yielding movement above referred to.

From the foregoing, it will be obvious that when the driving relation of the worm and gear is complete any excess rotary movement of the motor and worm in the same general direction is not communicated to the gear and cannot possibly have any efiect on the gate actuating mechanism, of which the said gear forms a part, but at the same time the beveled outer flanks of the end teeth of worm and worm gear, and 29 respectively, are yieldingly held in an abutting relation in readiness for reverse rotative movement of the motor. On such movement being communicated to the worm, a prompt meshing or operative driving engagement of worm and gear teeth is obtained, whereupon the other limiting position of the gate is quickly reached, bringing the flanks of the other outer teeth in a similar yieldingly-held relation, as will be read ily understood.

The arms l0 are @aced apart to provide clearances at each-side of the segment gear for the free movement therein. of the connecting rod fork 21 from the position shown in Figure 1 to that in Figure 3, and'vice versa. As clearly indicated the drawings, the stoplugs are positioned intermediate the arms 10 and out of the path of the segment teeth the stop bar 22 projecting sufficiently therebeyond to co-act with the lugs. Furthermore, the post 4 may be provided with the end opening 4c of a sufficient dimension as to permit the entrance therethrough of the motor and mechanism en Z2200, rod. connection being made through the top end opening 49 covered by the cap 30, the plate 31 serving as a closure for the side openi do not intend to limit myself the conpointed out in the appended claims.

crank connection and cooperating to struction precisely as nor to the exact arrangement of the parts, for it will be obvious that variations therefrom may be made without in any Way departing from the spirit and scope of my invention as is 1 Any reference in the claims to the engaging and disengaging of the teeth. relates to an operative driving engagement and a releasing from such relation.

Having thus described my inventionfand illustrated. its use, what i claim as new and desire to secure by Letters Patent, is the followingt v 1. in a device of the character described, the combination of a post, a shaft journa ed therein, a gate mounted on said shaft to rotate with it, a motor operated driving gear, a driven gear member, a crank connection between the driven member and said 25:31 shaft, said driven member being construct ed for engagement with said gear to actu-- ate the arm to its vertical and horizons operative positions and for disengagem therefrom, as an operative position is reached, and stop means for the driven member disposed out of the path of sai the members when disengaged in an a relation whereby to insure a dri engagement therebetween upon reverse re tation of the driving gear member.

2. In a device of the character dot the combination of a on adapted to assume alternate raise lowered operative positions, actuatin me comprising driving a d riven c structed and arrang' :tor disengagei as the gate reaches operative positand a stationary stop means, said driven gear operatively connected at one portion thereof with said gate and provided at "is other portion thereof with a stop mer movable with said riven gear and. adap' to engage with saf i stop means as the disengage;

3. in a crossing gate, the comhir of a gate, a frame, and motor'oper tuating means for said. gate moan er said frame comprising associated b amally disengaged driving and. driven a stop member formed within said frail adjacent said driving gear, and a spring held stop member mounted on the dri gear and movable therewith to co-act w the other stop member and yieldingly tain the normal relation ofthe gears.

a railway crossing gate,the coin nation of a frame having a base portio and upwardly extending spaced arnis, actuating means comprising a driving and a driven gear iournaled in said c and arms respectively, abutment to on said base and disposed out of the of said driven gear, and a stop ried by said driven gear to co-act with said abutment, substantially as andfor the purpose set forth. v

5. In a crossing gate, and in combinaposed with reference. to the driving gear,

and a 'yieldable stop member'movable with V H insure a. driving engagement between the gears upon-reverserotation-off-.thedriving I the driven gear and projecting therefrom to yieldingly engage Filth ieither' of the first mentioned stop member'si fas the gears disengage, all of said members being disposed out of the path of .thegeai's 'during the actuation of thegate.

6. In a device of the combination of a post, a shaft lournaled said gearing to raise; and lower the spaced stop members m said post, mem r s of said gearing being jconstructediand ar ranged for disengagement the gateff' reaches a limiting position,and one of said gearing'members formed 'witha portion exg r tending'therefrom to co-act with one of the said stop members for insuring the ren-i and movable to assumealte'rnate raised and lowered operative positions, actuating means therefor connected with said shaft, and comprising driving and driven gears adapted to disengage as the gate reaches an operative position, and stop means in saidflpost com-. prising members cofiperative as'the gears disengage, one of said members carried by thedriven gear and movable therewith to engage (another of said members whereby to gear;

the gate reaches an operative position, said driven gear" provided with operative coninections to said gate and having a stop member movable therewith independently of; said connections, and fixed stop -means located out. of th e path of said operative connections and engageable by said member as the gears 'disen age.

"q- In testimony whereof. "have hereuntosignedmy name-and aflixed my) signature 'vgagement ofsaid; gearing members to'ac-.-, 'fthej presence. .,0f'- th6-. S i -b lt- .1 tuate the gatetoits other limitingposition substantially-as described." 1 z 7. In a device of the character1described, the combination of a post,-jashaft journaled. *ftherein, agate associated withsaid shaft.-

.. 'G nDI;

the combination of afpost, agate pivotally mounted thereon 'and'adapted to assume al--, ternate raised and' loweredoperativeiposit1on 's' with;reference to said post, motor op-- as 'fil ct a g eans therefor 'compm j associated driving and dri gears I :7 Structed and arranged for dlsengagement 

